Dispensing and packaging device for fluids



May 2, 1939. M c, SCHWAB DISPENSING AND PACKAGING D-EVICE FOR FLUIDS 5shets-sheei 1 y Filed Jan. ll, 1936 IN VENTOR,

Marij/n Jah/unl, BY A W H IS ATTORNEY.

May 2, 1939- M. c. SCHWAB 2,156,313

DISPENSING AND PACKAGING DEVICE FOR FLUIDS Filed Jan. 11, 1936ssheets-sheet'z y Y v 'IM/ENTOR, 205y v 1% Jalmulz,

HIS ATTORNEY.

May 2, 1939- I M. c. SCHWAB 2,156,313

DISPENSING AND PACKAGING DEVICE FOR FLUIDS Filed Jan. ll, 1956 5Sheets-Sheet 5 HIS ATTORNEY.

May 2, 1939. M. c. SCHWAB 2,156,313

y DISPENSING AND PACKAGING DEVICE Foa FLUIDs @gw @gw @W5 IN VENTOR,

May 2, 1939. M. c. SCHWAB -DISPENSING AND PACKAGING DEVICE FOR FLUIDS 5Sheets-Sheet 5 Filed Jan. 1l, 1936 uv/ENTOR,

VMi

- Patented Mey 2,1939

Max-un c. schwab. chime. nl. 'Application Jmuaryun, 193e, serial No.sans 11 claims. '(cl. 12s-214) This invention relates to liquiddispensing apparatus of the general character referred to inl myapplication Serial No. 750,392, iiled October 27, 1934, andthat of myapplication Serial No.

, 5 698,544, tiled Nov. 1'1, 1933, now Patent No. 2,010,-

417, granted August 6, 1935, and is directed to certain improvementsthereover.

This invention is particularly directed to the.

provision of liquid dispensing apparatus having l certain advantagesover my aforementioned application and patent in that the dispensingassembly and container 'may be merchandised as a unitary assembly,requiring the minimum amount of handling to put the same to use. l In myprior applications and patent aforementioned, the dispensing apparatusand container for .the liquid comprise, in general, separatelyattachable units which may be interchangeably used. In-my presentinvention, I contemplate in- 20 ciuding the vdispensing apparatus more-or less as part of the container, whichmay be centrallyV assembled andIdistributed. wherever desired.

To put the device contemplated by my. present invention into use, it isnecessary only Ito break 25 the seal or cap of the container, and thedevice will forthwith be available for the purpose con- 1 tempfated,such, for example, as intravenous,

subcutaneous injections, with norequirement for sterilization of thedispensing device,as it reaches l :iO-the user in sterile condition, orotherwise in readiness for the desired purpose;

Other objects' of my invention, including features embodied inmy priorapplications, reside in the association. with containers for dispensing35 liquids, particularly liquids 'for dispensingv subcutaneous,intravenous injections, oi compact dispensing assemblies more or lessforming part of the container, vyet providing, in va simple and such'objects and advantages 'inherent nr my construction will become apparentand will bemore clearly pointed out as this description. proceeds, andfor this I refer to the accom- Dnyin drawinBS. forming-'ga hereof,v inwhichy w- Figure 1 isa longitudinal sectional view of one embodiment ofmy invention. showing a merchandisable container and dispensing devicecomp'letely assembled; f .FigureZ isa section taken on the line 2-2 ofFigure 1;

u Figure 3 is arragnientary-longitdinaljectional view of anotherembodiment readyfor use, but immediately before inversion for thispurpose;

Figure 4-is a section taken on the line 4-4 of Figure 5 is a fragmentarylongitudinal sec- 5 tional. view of another embodiment of my invention'1 Fi'gure 6 is a section taken on the line 6-6 of Figure '5:

Figure 7 is a fragmentary longitudinal sectional 10 view of anotherembodiment of my invention,

showing a unitary air ,filter and fluid conducting assembly;

' Figure 8 is section taken on the line 8-8 of Figure '1; l5 Figure 9 isa section taken on the line 9-9 of Figure 7; Y

Figure 10 is afragmentary longitudinal sec'- tional view of stillanother embodiment of my invention illustrating a unitary air iilter andfluid 20 conducting assembly; Y Figure 11 is a section taken `on theline li-li of Figure 10;

Figure 12 is a section taken on the line I2'-|2 Y of Figure 10;

Figure 13 is a still forther embodiment of my device, illustrating aunitary air filter and iiuid conducting assembly;

Figure 14 is a section taken on the line |4--i4 ofV Figure 13;

Figure 15-is a section taken on the line |5-I5 of Figure 13;

Figure 16 is a section taken on the line Iii-'I6l of Figure 13;

air filter and fluid conducting assembly; l

Figure 18 is' a section taken on the line I8 l8 of Figure 1'1; l

Flgure 19 is a section taken on the line I9-I9 40 Figure 20` is a-stillfurther embodiment of my inventioni showing a unitary air iilter andfluid conducting assembly;

y Flgure 21 is a section taken on the line ZI-ZIV' 45 of Figure' 20;

Flgure 22 is a section taken on the line 22- 22 ofFigure20;-

Figure 23 is a section taken on the line 23- 43 of Figure 20; f 50'Figure 24 is a still further embodiment of my invention, illustrating acombined vair filter and auxiliary fluid supply therefor; 'I

` Figure is a section taken on the line 26-25 of Figure 24: et

Figure 26 is another embodiment of my invention of the characterreferred to in Figure 24;

Figure 27 is a section taken on the lin'e 21-21 of Figure 26; l Figure28 is a longitudinal sectionall view of another embodiment o! myinvention, in which' a unitary air filter and fluid conducting assemblymay be associated with the sealing cap of the container;

Figure. 29 is a section taken on the line 29 -29 o! Figure 28;

Figure 30 is a section taken on the line 30-36 ci Figure 28; Figure 31is a section taken on the line 3I-3l of Figure 28..

Making reference tothe drawings, it will be understood that all of theviews are shown in the vertical position of the container and that foruse, the various embodiments illustrated operate in the invertedposition.

I Making more particular reference to the drawings in connection withthe embodiment illustrated in Figure 1,1 the liquid dispensing devicecomprises a container C, inthe form to provide a merchandising packageof completely sealed fluid. Where the same is particularly to be used asan appliance for dispensing iiulds used in intravenous or subcutaneousinjections, such as blood for transfusion purposes, physiological salt430 solutions, glucose solutions, and other uids in the iield ofmedicine, the entire assembly, in completely sterile condition, ispackaged at some centralized point, from which'point it may bedistributed, to be used by the medical profes- 35 sion either atisolated points where modern facilities are not available, or inhospitals, where it may be stored. to bein readiness on an instantsnotice, to supply the demands for such materials.

40 Thus, while previously a certain amolmt of preparation was involvedin dispensing fluids of' the character contemplated by this invention,by

the provision of the devicecontemplated by this' invention, packages ofthe necessary fluids and 4'5 the dispensing means therefor may beprepared and provided as a complete assembly, to await the occasion forits need.

The container C has the usual bottle-like body 5, and a neck 6, whichmay be provided with a conventional external screw l, to which may beapplied a screw cap 1a, interposing a suitable gasket 1b, for sealingthe same. Within the interior of the neck, I provide an insert 6,serving as a mount for a fluidconducting tube and air filter assemblycomprising a fluid duct or tube 9, having an outer beaded end Ill, andan inner opening II, extending into-the interior of the container C forashort distance beyond the neck.

This duct or tube passes through the outer wall I2, and the inner wailI3 of the insert [previously described, said insert presenting betweenthese walls a chamber Il.

The Youter wan' lz is 'provided with an ermee I5, serving as anair1inlet. The inner wall I3 has supported therein an air duct or tubeI6.--

Whose upper end I1 issupported in the-wall I3,

a frictlonally or screw threaded, or by other suitable fastening means;Where the ducts or tubes 8 and I6are made of v'I0 glass and the insert 8of rubber, ''lctional enexpedient. It will also be-understood that whereposition.

the insert 8 is made of rubber, a driving tit will be sucient to holdthe' assembly within the interior of the neck 6, but otherwise otherfastening means may be employed to hold the insert 8 within theinterior'of the neck 6. 5

It will be understood'that the air duct or tube I6 has its lowermost endI8 extending near the bottomv I9 of the container.

Whilethe insert 6 may be a hollow member, it is -preferred that theouter wall I2 and the 10 inner wall I3 be connected by spaced webs 20and 2| respectively, leaving clear portions 22 and 23 therebetween, forpurposes which will appear more clearly as this description proceeds.

With the device as described provided, form- 15 ing a packagingcontainer and dispensing device. upon-removal of the cap 1a, thecontainer is lled with the desired uiri4 either before or afterinserting the neck insert and its assembly. Where the neck insert 8 andthe assembly carried there- 20 by are irst inserted into the neck 6, theentire assembly may be cleansed, matured and sterilized, and in thisform and held in inverted position, iiuid may be forced through the uidduct 9 by lling apparatus, air being displaced through 25 A' l the oriceI5 after passing through the air tube I6. When the container has beeniilled to the point just reaching the end I8, the container isv againinverted and to the iiuid tube 9, at lthe end I0, there is applied thesealing tip 2l. There- 30 after, and if necessary, additionalsterilizing treatment may be given to the container and contents,andthen the sealing cap la applied in This provides the merchandisingpackage.

When ready for use, the cap 'la is removed by unscrewing, where this-type of connection is usedl and the tip 24 removed from the liquid owtube 9. In place of the tip 24 there then may be attached the tubeV 25,carrying the hypodermic 40 needle 26, more clearly shown in Figure 3.

It will be, understood that while I have described and prefer myassembly for dispensing for injection purposes, this is primarily forpurposes of exempliiication of my invention. 45

With the assembly thusprovided, the entire container C and its liquidcontents, are inverted, applying some pinch means for the tube 25, toprevent a premature flow oi' the liquid.

It will be observed that the liquid used to fill 50 the container havingbeen brought to a point just below. the lowermost end II of the liquidiiow tube, a supply of liquid will be retained, within the air duct I6and which, on inversion, will be deposited-within the chamber Il. Whenready for 55 dispensing the lfluid, the fluid will leavethrough theliquid tube 9. A constant tlow and continuous column of fluid will beassured `by the admission of air through the air tube orduct I6, enter.ing the same through the .orice I5, but passing so through the chamberVI 4 completely or partiallyv filled with the iuid deposited from thetube I6.

, Thus it Will be Observed that as the uid leaves the fluid duct or tube9, air enters into the space displaced bythe fluid but passing throughthe 65 liquid in the chamber il, which serves to lter out any dustparticles, lint orlotiier'materialV whichmaybeentrainedin'theair.

In the operation of this device the liquid retained within air duct I6will be deposited within 70 the chamber Il and remains therein withoutrunning out. The inversion of the container C leaves a within thecontainer in the vicinity of the bottom I 9. 'I'l'iisjmeans thatthenorrnal atmospheric pressure applied at I5is greaterthan 75 aimaisthe pressure within chamberv Il. As soon as the pinch means for the tube25 is released to permit the flow of liquid from the container, the aircoming in through air inlet I 5 enters at a constant rate and keeps theliquid within the\ chamber Il. This retention of vliquid in the chamberIl isA further aided byvtwo well known phenomena. 'I'he air inlet I5 ismade very small in comparison with the'other members making up thisdispensing means, and therefore the lphenomena oi skin resistance ofmaterials such as glass and the surface tension of liquids further aidin keeping the liquid in the chamber It.

By providing the neck oi' the bottle 6 of clear glass, the operation ofthe dispensing device may be observed. By viewing the chamber I4 throughthe clear portions 22 and 23, at which points there will be observed thebubbling and washing operation of the air as it passes through the fluidcontained in the chamber I4. the rate of flow and its regularity may beascertained from the nature and character of the bubbles passing throughthe liquid in the chamber Il. l' It will further be observed that theopening II is at a point well above th'e wall I3 when the container isinv an inverted position so that^any in- .soluble material will separateout and will not container adjacent the bottom I9.

In this; manner it will be observed that I have provided a vdevice whichcompletely eliminates the fluid gravitating from the duct 9 and the airentering into the container to displace the same. In Figures 3 and 4' Ihave illustrated av construetion embodying all the features of Figure 1except that the outer wall I2 vand the inner wail I3 are not connectedin any way, so asto provide a clear portion therebetween, constitutingthe chamber Il, the device otherwise,A in all respects. operatingidentically with that illustrated and described in connection withFigure l. 1

yIn Figure 5 another embodiment of my invention is illustrated in whichthe container C may be of the same construction as shown in 4Iiigure land in whose neck 6 there is provided an insert 8a which servesv as a.mount for an air iilter and partition I2a and whose upper wall is denedvby partition I2a previously described. "Extending '75 `the partitionlia, having therebetween the air lter compartment Ila. The inlet Ia isformed in the tube Ilia and lies to the outer side offth'e insert 8a andpasses through the-orifice Ila,V formed in the insert 8a andconnectsg'with the through the partition Ila there is provided the tubeIIa. terminating' ata point adjacent the bottom Il.

The operation of the device shown in Figure 5 is otherwise'simiiar tothat shown in Figure 1.

When the container is i'uli, the liquid in the container C will till thecompartment Ila. inversion of the device from the form shown in Figure5, for lpurposes of dispensing the liquid from the container, liquidwill leave through the liquid duct 9 and air will enter the vcontainer,through the orice Ilia, rising upwardly through the tube Ia. and beingdscharged adjacent the bottomli! through the tube Isa. However, the

air so discharged will pass through the liquid retained within the ltercompartment Ma. The 'liquid retained in compartment Ila does not run outthrough air inlet tube IGa for the same reasons which have beendiscussed' in connection with compartment I4.

By disposing the compartment Ila just above the'neckinside of thecontainer, a supply of fluid wiritl'iin the iilter compartment Ila isassured. jupon inversion of the container for purposes of \dispensing.The liquid so retained within the compartment lla and which iters outany ma-v teriai which may be entrained inthe air, cannot thereaftercontaminate the uid that isbeing dispensed. l

'I'he enlarged portion formed by the compartment lla assures a clear airspace in the tube I8a so that air may displace the fluid being dispensedwithout causing variation in the rate of iiow and assuring a uniform`and continuous columnl oi liquid for dispensing purposes.

It will be 'observed that the fluid dispensing tube 9 and air inlet tubelia are retained within the neck of the bottle t as in the embodimentillustrated in Figure 1 so that the packaging operation, afterlsterilization, seals these members.

It will be understood 'that while the assembly thus far described may belled after inserting ,the neck insert and its assembly, comprising theair filter andthe uid conducting tube, nevertheless that the containermay be rst illed with iluid up to the proper level', in the 'uprightposition as illustrated, and thereafter the assembly comprising the airiiiter and iiuid conducting tubes may be inserted, Vwith their mountingmeans in the form of the neck insert.

`In Figure 7, Il have illustrated an air outlet and iiuid conductingassembly which may be made as an integral construction and is mostsuitable where the parts are made of glass. In :this embodiment, theneck insert 8b may be fricnected and through an orice oentraiy thereof,

i there is frictionallyheld the integral air iilter and fluid conductingtube assembly in whichl 9b is the fluid duct,iprovided at its outer endwith the beaded end IIb. The inner end of the fluid duct B b terminatesadjacent an opening lI Ib on the interior of the container. The enlargedcylindrical tube deiined bythe upper partition I2b and the lowerpartition IIb providesthe compartment IIb; Air may enter the samethrough the orice I 5b formed in the tube Ib, passing through 4,theoriiice I'Ibf in the. neck insert' 8b previously describedL and said IBbissealed to the compartment Mb adjacent thepartition 12b. 5 v v i Thetube ib extends well within the compartment IIb and is sealed at. itsextremity. Extending beyond the 'partition IIb, 'the restricted tubeoIQ!) is provided, which terminates adjacentr the bottom I0. Coaxialwith the tube I lb there in connection with the embodiment illustratedin Figure l.

when the device is sued to a point Just below vthe opening IIb,iiuidwill rise into the compartment I 4b. Upon inversion of thecontrivance for dispensing apparatus, uid will be trapped within thecompartment Mb. In this form upon inversion the liquid in the upper partof air inlet tube, I 8b is retained in the compartment II-bfor thereasons already discussed in connection withv compartment Il above,aided by the trapping means here disclosed.

The viiuid'for dispensing' will leave through the tube 9b, dischargingthrough the opening I0b and entering into this duct through the openingI Ib. This opening is positioned at a point spaced from the insert 8b sothat sediment which may be in the liqiud is not discharged, the overowPoint being at a point above the zone of sedimentation.

Air will enter through the oriiice I5b, and be directed through the tubeI6b, coaxial with the tubeSb, for a portion of its length and then bedirected through the tube |9b, the orice 201), and bubble through theliquid retained in the air filter compartment IIIb. Y t. A I

The device otherwise operates as previously described except that byreason of the provision of the inverted tube lsb, no liquid will beentrained,

'f to be discharged through the oriilce` |51), at any time, thusassuringthe minimum amount of obstruction to the incoming air necessary toreplace the outowing liquid, and at the Sametime assuring that none ofthe incoming air will enter 'the container without being washed free ofany materials entrained in the air before being disv charged through thetube IBb into the container.

Referring now to the embodiment illustrated in El 10, va neck insertlcserves to suspend and ho d the air iter and `fluid conducting tubeassembly in which 9c is the fluid duct, at its outer end llc a Vbeadedportion to receive a dispensing tube, and having its inner end adjacentthe orifice IIe. A cylindrical chamber, formed with an orice `I2c and anopening I 3c, providesn the air filter clamber Mc to which air aybevdirected through the oriiice lic in the tu Isc,

sealed' to the compartment llc previously described, and positioned tosurround the iluid duct se.Y The tube .Ice is meu-muy heid .within suvorifice IIc formedin the insert lc.

'me ue, at its innermost j Ile, terminating. f

, The operation of the otherwise porates the primary features of theembodiments 1.

tion, is connected with thetube adjacent'the bottom I8.A

previously described and in conhectionf withl'iguresand'l.:

`mmm-e13rnmreaeseriheaeeuufur'u's embodiment of myinvention the airfilter and iluid conducting assembly ismounted'andl `supported by theinsert Id and comprises a nuifd duct 0d, terminating at its'outer endIld with'a beaded portion for .connection to a dispensingtube and havingdircctedfinwardly of the containcr,an opening Ildataside wall.v

a-'eynndrieel compartment denned by the pertition I2d at the liner sideand the lower por- 2,1oegsis tion Ild at' the lower side, outlines theair nlter compartment Md, into which, through the opening lid, air maybe passed along the air tube I ld, terminating well within thecompartment I Id Just described, and coaxially with the uid duct 9d.

Surrounding the terminal portion of the tube |611 there is provided acompartment IQd, having an oriiice 20d adjacent the partition I2d.Extending beyond the partition I3d is the tube IM, terminating near thebottom I9. p

'I'he operation of this embodiment includes the primary featuresoutlined in connection with the embodiment illustrated in Figure 'l inthat liquid entrapped within the compartment Md, upon inversion of theentire assembly, will not gravitate out through the tube ltd and affectthe uniform entrance of air. By arranging the iluid duct 9d to encirclethe air duct |66, observational the uid as it is being dispensed, may bereadily made.

Here again the ltering liquid is retained in compartment Md, not onlybecause of the greater -pressures at 15d, the skin resistence of thematerial and the surface tension of the liquids, but also trapping meanshere disclosed.

In Figure 17 r have mustrsted'e sun further ,embodiment o1' my inventionin which the neck -insert 8e serves to support the vair filter and fluidconducting tube assembly in which 9e is the fluid duct, terminating atits outer end Ille,with a beaded end for connection to a dispensing tubeand having its inner end` terminating adjacent an oriiice II e, spacedfrom the insert 8e, thereby to provide a sedimentation zone when .thedispensing device is inverted. A ,cylindrical member dened at the upperportion by the partition I2 e, formed with an oriiice, andeat its lowerportion bythe partition Ile, provide the air filter compartment Ile. Airmay enter. through the oriiice I 5e vformed laterally in the tube Se,and connected with the air `duct Ie, said ainbeing directed through thecompartment Ile and influid discharge duct 9e.

In `Figure 20 I have illustrated another embodiment of my invention inwhich the neck insert lfvserves to mount and support the air filterobservation of the air lter compartment and the partition Ilf provides`theair nlter compartment .I Hf, into which air may be directed throughthe oi'inde lil, and through the tube ICI, terminating in a U-shaDedtube Hf, the exit end of which is adjacent the partition Ilf. Airpassing through the liquid in the compartment Ilf is discharged throughthe tube III adjacent the bottom I.

In this construction; the compartment ilf derives its uid from thecontainer in the manner 1 nor can any air-enter the container withoutpassing through the liquid 'contained in the compartment Ilf. Anyturbulence by reason of the rate of ilow of air through this compartmentwill not discharge any iiuid from the compartfment Ilf, through the tube|8f, thereby effectively avoiding any contaminationbetween the uid usedfor air filtering in the compartment |41 and that to be dispensed fromthe container C. In Figure 24, I have illustrated a still furtherembodiment of my invention in which the feaf, tures previously describedin connection with Figure 1 are illustrated, and in which the neckvorifice |5g formed in the outer partition |2g, pass through thecompartment |49' and into a tubev |6g, held by thepartition |30 and thento the enlarged portion |1g, from which extends the tube |89 which,terminates near the bottom 9.

In this construction, the enlarged tube portion |1g acts in the natureof an auxiliary fluid supply so that upon inversion ofthe container fordisf pensing purposes, fluid from the'enlarged portion IIg will flowinto the compartment My, acting as the air lter. The enlargedl portionHg further serves to break up the expanding air bubbles,

preventing entrainment of the 1iquid,`serving as the air filter throughthe tube Ig and preventing contamination of theliquid to be dispensed,and also assuring a uniform rate ofdischarge of liquid by uniformresistance the liquid Kprovides to incoming air. i

` Otherwise, the neck insert 8g includes the f spaced webs 20g and 2 Ig,providing the clear'portions 22g and 23g to permit viewing of the airiilter compartment Hg. 1

In Figure 26, I have illustrated the addition of the auxiliary iiuidchamber to be'used in connection with the embodiment illustrated inFigures 3 and 4.

In Figures 28 to 31 I have shown a dispensing device in the form of acontainer C, as previously described. In this construction, however, tothe neck 6, having the screw threaded portion 1, there is provided'a cap1c, formed with an .orifice 1d,

9k terminates at the interior of the container inA an 'opening ilk. Apartition |2k and a neck |316 dene the airlter compartment ilk, to which.air may be conducted from. the orice |57c, open to thel atmosphere,through` the air tube |6k, surrounding thefuid duct 9k, previouslymentioned. l M y The air tube |6k is held within the insert 8k in anorifice, `formed therein, i'rictionally. The innermost portion of thevtube "ik is closedand is sealed at its approximate medial portion intothe partition |2k. Centrally of the air tube |`6lc there is provided aninwardly directed tube |9lc, which has'its exit portion laterallyextended into a side wall oiy the air tube |6lc forming the opening 20k,through which the air may escape through any liquid within thecompartment Mk when the assembly is inverted. The air then escapesthrough the neck |3k and its extension lak.

This form of construction will serve to retain the air iiltercompartment ilk illled with liquid,

and the relationship between the oriiice 20k and the tube |8lc is suchthat the air cannot displace the liquid in the compartment ldlc but isgiven the opportunity for expansion, without displacing the liquidwithin 'the compartment Mk, and. without contaminating the liquid to bedispensed.

The construction further provides an air filter and iiuid conductingassembly which ne'ed not be permanently assembled with the container butmay be associated therewith when necessary for use, the cap 1c alsoserving as a means to retain the frictionally held plug in associationwith the neck of the bottle.

It will be understood that while the cap 'Ic is shown with the orifice1d, when merchandised in the sealed form, prior to the insertion of theplug or insert 8k, the container without the air iilter and iiuidconducting tube, is sealed by a gasket fully covering the neck of thebottle 6, and held in this position by the cap 1c.

In Figures 7 to 20 and 28, a single tip or seal 24h (shown in dottedlines) may serve to cover both the iiuid outlet tube and the air inletoriiice, thus insuring the retention of the assembly in a sterilizedcondition, in afacile manner.

In all forms shown, it will be understood that the size of the iuidoutlet is related to the size of the air inlets so that the rate of flowoi liquid from the fluid ducts will maintain a balanced condition,preventing the flow of iiuid from the air filter compartments when thedevices are inverted. However, I may, if so desired, use a valvisI ingdevice such as shown, and specifically claimed,

means is maintained in position. Upon a change in conditions, startingthe ow oi liquid, the diminished air pressure or partial vacuum formedin the container will unseatthe valve, permitting the admission of air,providing an atmospheric made'in readiness at the centralized bottlingand assembling point.

`While .I have emphasized the` novelty of the construction, for purposesin the field of medicine, it will be understood that` thisdevice has awider eld of utility, which will be readily understood by thoseskilled'. in the art.

It will further be observed that wnuer have' described illy/assembly ashaving particular utils ity/byreason of the fact that it providesa'dvice which may dispense iiuid's without contamination bythe materialscarried by air, thus eiectively iiltering the air which is necessaryi'or displacing the uid which is being dispensed, the air passageprovided for. displacing the liquid also .u

" duct permits sterilization oi the container and oi' the liquid afterfilling and permits discharge of any entrained air, and capping toeffect a vacuum sealing of the thus sterilized container and contents.

Having thus described my invention and illustrated its use, what-.Iclaim as new and desire to secure by Letters Patent, is-

1. A self-contained uid container and dispensing device operable uponinversion and of the character described comprising, in combination withthe neck of said container, an air filter chamber and uid conductingtube assembly comprising spaced walls forming a uid chamber, a iluidconduit extending through said space/d walls from a point 'within saidcontainer to a point accessible through the neck of said container, an

Aair conducting tube suspended from one of said wallsand an air inletthrough the other of said l walls. V

2. A self-contained ilu'id container and dis` pensing device of thecharacter described comprising, in combination with the neck kiii' saidcontainer, an air iiiter chamber and uld conducting tube assemblycomprising spaced walls" forming a fluid chamber, a fluid conduitextending through said spaced walls from a point with-` in saidcontainer to `apoint accessible through the neck of said container, anair .conducting tube suspended from one of said walls and an air inletthrough the other of .said walls, the neck of said container and wallsaforementioned providing an air iiltering chamber.

3. A self-contained fluid container and dispensing device operable uponinversion comprising in combination, a chamber for iiuid formed byspacedinserts within the neck of said container, an air inlet to saidchamber for directing and conducting the air through the liquid in .saidchamber and into said container, a conduit` through said inserts forliquid discharge from said container, the interior of saidv chamberbeing visible through the neck of said container.

4. In combination with a container, an vair filter and iiuid dispensingassembly operable upon inversion comprising a casing forming a fluidchamber, conduits connected` with said chamber, one open to theatmosphere, the other connected with the interior of said container, aliquid tube leading from a point .interiorly of said container to apoint accessible from theexterior of said container, and means forsuspending said tubes within the neck of said container.,

5. An air lter and Viiuid dispensing assembly operableupon inveisioncomprising a iiuid chamber adapted to be disposed within a container,

' an dir tube adanted tore directed interioriyof said container, an airinlet to said chamber, a iiuid conducting tube coaxially Varranged'witlisaid air tube having inlet and outlet passages independently of .saidair tube.

6. An air iilter and fluid dispensing assembly operable upon inversionincluding a iiuid clamber insertible through the neck of a container andincludingan air`inlet and an air outlet, the latter lof which serves asan inlet for uld to the inand terior or said chamber from saidcontainer,

aimais means for suspending said assembly vwithin the chamber includingan independent iiuid discharge conduit.

7. An air nlterand iluid dispensing assembly operable upon inversion fora container, comprising a uid discharge conduit and an air filteringchamber in non-communicating relationship. an air inlet tosaid chamber,and an air outlet tube from said chamber serving as means for lling saidchamber with fluid, said outlet tube including means for holding anauxiliary supply of liquid. A

8. An,air illter and uid dispensing assembly operable upon inversion fora container, comprising a iiuid discharge conduit and a fluid retainingmember forming an air filtering chamber in non-communicatingrelationship to said uid discharge conduit, an air inlet to said member,and an air outlet from said member including an enlarged portion forretaining liquid in said member during the passage of air therethrough.

9. A self-contained fluid container and dispensing device operable uponinversion, comprising in combination with said container, an air inletduct extending into a bottom portion of said container. the upper end ofsaid air inlet duct being below the mouth of the container, an airwashing chamber formed in an intermediate portion of said air inletduct, a iluid dispensing duct, the upper end of said uid ductterminating below the mouth or said container for at- 'tachment theretoof a dispenser tube for subcutaneous or intravenous injections. meansinserted in the neck of said container for suspending said air inletduct and said iluid dispensing duct within the container, and a closurefor the neck 'of the container 'for sealing said ducts and means.

10. A self contained iiuid container and dispensing device operableupon. inversion. comprising inf combination with said container, an airinlet duct for directing and conducting an ihm the bottom of saidcontainer, a chamber for illtering vincoming vair forming anintermediate portion of saidair inlet duct. and containing as -a illtera portion of the fluid to be dispensed, a conduit for discharging fluidfrom said container, and means inserted in the neck of said containerfor suspending said air inlet duct' and said conduit within saidcontainer, the interior of said chamber being visible through thematerial of which said container is `iormed.

11. A self contained-iiuid containerand dispensing device"operable uponinversion, comprising in`combination with said containerQa chamser tomeer incoming sir immens s mier' s portion of liquid to be dispensed. anair inlet to ysaid chamber. an air outlet'from said chamber saidcontainer is' formed.

